Boarded up windows beside the entrance to the Jack Evans Police Headquarters on S. Lamar provide the backdrop for a television news segment in Dallas, Sunday, June 14, 2015. James Boulware, the man linked to a violent assault on Dallas police headquarters was accused two years earlier of choking his mother, then fleeing to an East Texas town where schools were locked down out of fear he would attack them as "soft targets," according to accounts from police and family members. (Guy Reynolds/The Dallas Morning News via AP)
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